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TOPSHOT - Usain Bolt talks to the media upon arrival at Sydney international airport on August 18, 2018. - Bolt, 31-year-old eight-time Olympic champion, arrived to start training with the A-League club Central Coast Mariners. (Photo by Saeed KHAN / AFP) (Photo credit should read SAEED KHAN/AFP/Getty Images)

TOPSHOT - Usain Bolt talks to the media upon arrival at Sydney international airport on August 18, 2018. - Bolt, 31-year-old eight-time Olympic champion, arrived to start training with the A-League club Central Coast Mariners. (Photo by Saeed KHAN / AFP)        (Photo credit should read SAEED KHAN/AFP/Getty Images)